Black Powdery Substance in Nose

Patient: Hi, black powdery substance is in my nose! Every time I take a cloth to wipe it, some of it comes off on it. It hasn’t gone away for 3 days. It doesn’t hurt, but it can’t be normal, and I’m starting to worry. Please help, thank you! (There is no category for this!? I just put it in the Allergies section, hope that won’t be a problem.)

Symptoms: Black Powdery Substance in Nose

Doctor: